COLUMBIA, Md., Feb. 25, 2013 /PRNewswire/ -- Japanese smartphone panelists are the predominant users of Voice over IP (VoIP) applications on mobile devices, according to the latest updates by Arbitron Mobile for its smartphone measurement services in seven countries around the world.

Almost 70 percent of the smartphone panelists in Japan accessed VoIP apps during the month of January, spending six hours and 25 minutes with these multi-faceted voice and messaging apps. The Arbitron Mobile on-device software meter reported that VoIP users in the Japan smartphone panel accessed their VoIP apps an average of 222 times in the month, three times more than panelists in Indonesia, who at 65.9 sessions per month are the second most active users of VoIP apps across the seven Arbitron Mobile-based smartphone panels.

41 percent of Indonesia panelists use VoIP apps on their mobile devices, spending an average of 2 hours and 15 minutes a month.

China panelists are the least active users of VoIP apps. Only 16.4 percent of the China smartphone panel (operated by iResearch) accessed any VoIP apps in the month of January.

Japanese smartphone panelists, the heaviest users of mobile VoIP, spend the least amount of time—1 hour, 36 minutes in the month—and have the fewest sessions—57.8 in the month—for carrier-based voice calls. Indonesian panelists, the second heaviest users of VoIP are the second lightest user of their carrier calling minutes.

Three VoIP apps occupy the leading position among Arbitron smartphone panelists around the world. Skype predominates in U.S. and Europe; LINE leads in Japan and Indonesia; and Youxin is the leader in a crowded field of VoIP apps in China.

In the China smartphone panel, which has the lowest penetration of VoIP access—16.4 percent—there are ten VoIP apps that see monthly access by one percent or more of the panel. In the six other country panels, VoIP access is concentrated between two to four apps.

About iResearch Consulting

iResearch Consulting, founded 2002, is the leading consulting and media measurement company in the Internet industry in China. With more than 200 employees, iResearch, headquartered in Shanghai, has been at the forefront of Chinese Internet measurements and operates a currency Internet audience rating service for China.

About Arbitron Mobile

Arbitron Mobile Oy, a wholly owned subsidiary of Arbitron Inc., uses a proprietary, on-device software meter to provide marketers, the media, content providers, app developers, and wireless access suppliers with information on how mobile consumers use apps, surf the web, engage in social media, participate in e-commerce, and employ their devices to communicate.

Arbitron Inc. (NYSE: ARB) is an international media and marketing research firm serving the media–radio, television, cable and out-of-home; the mobile industry as well as advertising agencies and advertisers around the world.

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